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  • METEOROLOGY AND CLIMATOLOGY  (10)
  • METEOROLOGY  (3)
  • Control methods-Helminths, general  (1)
Collection
Keywords
Publisher
Years
  • 1
    Electronic Resource
    Electronic Resource
    World Association for the Advancement of Veterinary Parasitology (W.A.A.V.P.) guidelines for evaluating the efficacy of anthelmintics for dogs and cats
    Amsterdam : Elsevier
    Veterinary Parasitology 52 (1994), S. 179-202 
    Details
    ISSN: 0304-4017
    Keywords: Cat ; Control methods-Helminths, general ; Dog
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0304-4017(94)90110-4
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Numerical simulation of flow near steep mountains with a potential enstrophy conserving scheme for the shallow water equations (1977)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: Numerical experiments show that use of a potential enstrophy conserving scheme drastically improves numerical simulation of flow near steep mountains.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 111-115
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    The parameterization of the planetary boundary layer in the UCLA general circulation model - Formulation and results (1983)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: A planetary boundary layer (PBL) parameterization for general circulation models (GCMs) is presented. It uses a mixed-layer approach in which the PBL is assumed to be capped by discontinuities in the mean vertical profiles. Both clear and cloud-topped boundary layers are parameterized. Particular emphasis is placed on the formulation of the coupling between the PBL and both the free atmosphere and cumulus convection. For this purpose a modified sigma-coordinate is introduced in which the PBL top and the lower boundary are both coordinate surfaces. The use of a bulk PBL formulation with this coordinate is extensively discussed. Results are presented from a July simulation produced by the UCLA GCM. PBL-related variables are shown, to illustrate the various regimes the parameterization is capable of simulating.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Monthly Weather Review (ISSN 0027-0644); 111; 2224-224
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Interaction of a cumulus cloud ensemble with the large-scale environment. II (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The closure assumption of the Arakawa-Schubert (1974) cumulus parameterization is examined with attention to the kinetic energy budget of a cumulus subensemble. It is concluded that dissipation should depend primarily on cloud type, and that cloud-work functions calculated under different synoptic conditions should consequently be quasi-constant for each cloud type. Observational evidence for the cloud-work function quasi-equilibrium is presented. Cloud-work functions are calculated from a variety of data sets in the tropics and subtropics. The results demonstrate that the cloud-work functions fall into a well-defined narrow range for each subensemble, although the thermodynamical vertical structures for each data set are quite different.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of the Atmospheric Sciences; 37; Dec. 198
    Format: text
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  • 5
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    A numerical study of a marine subtropical stratus cloud layer and its stability (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A model for numerical simulation of stratus cloud layers is constructed by combining a second-order closure, turbulent transfer model with a thermal radiative transfer model. The turbulent transfer model allows water vapor saturation. The combined turbulence-radiation model is applied to both a horizontally uniform one-dimensional case and a horizontally nonuniform two-dimensional case. In the latter, the dynamics of mesoscale circulations are also incorporated. Results of the two-dimensional simulation show that the layer cloud instability occurs where the sea surface temperature is high and the large-scale subsidence is weak. The simulated instability is analyzed in view of an instability criterion, the eddy kinetic energy budget, and evaporative cooling near the cloud top.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of the Atmospheric Sciences; 37; Dec. 198
    Format: text
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  • 6
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    Computational design of the basic dynamical processes of the UCLA general circulation model (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The 12-layer UCLA general circulation model encompassing troposphere and stratosphere (and superjacent 'sponge layer') is described. Prognostic variables are: surface pressure, horizontal velocity, temperature, water vapor and ozone in each layer, planetary boundary layer (PBL) depth, temperature, moisture and momentum discontinuities at PBL top, ground temperature and water storage, and mass of snow on ground. Selection of space finite-difference schemes for homogeneous incompressible flow, with/without a free surface, nonlinear two-dimensional nondivergent flow, enstrophy conserving schemes, momentum advection schemes, vertical and horizontal difference schemes, and time differencing schemes are discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
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  • 7
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    Interaction of a cumulus cloud ensemble with the large-scale environment (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Large-scale modification of the environment by cumulus clouds is discussed in terms of entrainment, detrainment, evaporation, and subsidence. Drying, warming, and condensation by vertical displacement of air are considered as well as budget equations for mass, static energy, water vapor, and liquid water.
    Keywords: METEOROLOGY
    Type: NASA-CR-132872
    Format: application/pdf
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  • 8
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    Design of the UCLA general circulation model (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An edited version is reported of notes distributed at the Summer Workshop on the UCLA General Circulation Model in June 1971. It presents the computational schemes of the UCLA model, along with the mathematical and physical principles on which these schemes are based. Included are the finite difference schemes for the governing fluid-dynamical equations, designed to maintain the important integral constraints and dispersion characteristics of the motion. Also given are the principles of parameterization of cumulus convection by an ensemble of identical clouds. A model of the ground hydrology, involving the liquid, ice and snow states of water, is included. A short summary is given of the scheme for computing solar and infrared radiation transfers through clear and cloudy air.
    Keywords: METEOROLOGY
    Type: NASA-CR-131531 , TR-7
    Format: application/pdf
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  • 9
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    Interaction of a cumulus cloud ensemble with the large-scale environment. I (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A theory of the interaction of a cumulus cloud ensemble with the large-scale environment is developed. In this theory, the large-scale environment is divided into the subcloud mixed layer and the region above. The time changes of the environment are governed by the heat and moisture budget equations for the subcloud mixed layer and for the region above, and by a prognostic equation for the depth of the mixed layer. In the environment above the mixed layer, the cumulus convection affects the temperature and moisture fields through cumulus-induced subsidence and detrainment of saturated air containing liquid water which evaporates in the environment. In the subcloud mixed layer, the cumulus convection does not act directly on the temperature and moisture fields, but it affects the depth of the mixed layer through cumulus-induced subsidence.
    Keywords: METEOROLOGY
    Type: Journal of the Atmospheric Sciences; 31; Apr. 197
    Format: text
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  • 10
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    An energy and potential enstrophy conserving scheme for the shallow water equations (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A three-dimensional finite difference scheme for the solution of the shallow water momentum equations which accounts for the conservation of potential enstrophy in the flow of a homogeneous incompressible shallow atmosphere over steep topography as well as for total energy conservation is presented. The scheme is derived to be consistent with a reasonable scheme for potential vorticity advection in a long-term integration for a general flow with divergent mass flux. Numerical comparisons of the characteristics of the present potential enstrophy-conserving scheme with those of a scheme that conserves potential enstrophy only for purely horizontal nondivergent flow are presented which demonstrate the reduction of computational noise in the wind field with the enstrophy-conserving scheme and its convergence even in relatively coarse grids.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Conference on Numerical Weather Prediction; Oct 29, 1979 - Nov 01, 1979; Silver Spring, MD
    Format: text
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    NASA TECHNICAL REPORTS
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